<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<font size="7">你好这个世界</font>,
<font  size="5" color="red"> 我很热情</font>,
<font  size="1" color="blue">还有写忧郁</font>
</body>
</html>